Cammo wrote:There must be some merit in having a water/oil cooler setup, honda fitted them from the factory to the NC29 and a few cbr600 models.

The standard ageing nc30/35 cooling system can do with all the help it can get I reckon, although I don't think an oil cooler is a better subtitute than bigger radiators, it does cost less though!

On the contrary, I think it's an item than can actually be negated.

The NC24 had an Oil cooler, the NC30 shares the same block hence having the pre-cast holes for the oil-cooler (albeit not drilled)

The easiest way to retrofit an air-based oil-cooler is:

NC24 oil pump, drill the holes and use an NC24 or UK NC30 oil-cooler.

Japan is quite a lot warmer than the UK (it's only been under 30c once or twice in the last two months) and my NC30 runs fine.

Although the NC24 isn't as 'advanced' as the NC30 (thigns improve with time) it was still a 'cutting edge' 80's race-bike, derived from the RVF400 80's racer. -> It had Elf / single arm, Anti-dive brakes, oil cooler, 16/18 wheels.

I think it was just a thing that was carried over from the 'race-bike' era... the NC30 it was deemed not necessary.

I'm wondering about the NC30's in the UK having one as it's colder.. perhaps they were made from NC24 parts? Or it was a decision that they'd look more sporty?

I'll fit a couple of temp gauges to the Sump and the cam-pipe and get a tempetaure of sump / in-circulation oil and see what we have.

Neosophist wrote:I'm wondering about the NC30's in the UK having one as it's colder.. perhaps they were made from NC24 parts? Or it was a decision that they'd look more sporty?

I think the cooling system of the '30 is a well known weakness (both for road riding and racing), perhaps the bean counters at honda wouldn't let them fit more equipment to the bike, it was already an expensive model.

If a bike were to be released with cooling system performance like the '30's these days, it wouldn't be accepted by the public at all.

My nc is fine riding in up to 40C weather, but it won't handle delays in stop/start riding in traffic at those temps!

Cammo wrote:

Neosophist wrote:I'm wondering about the NC30's in the UK having one as it's colder.. perhaps they were made from NC24 parts? Or it was a decision that they'd look more sporty?

I think the cooling system of the '30 is a well known weakness (both for road riding and racing), perhaps the bean counters at honda wouldn't let them fit more equipment to the bike, it was already an expensive model.

If a bike were to be released with cooling system performance like the '30's these days, it wouldn't be accepted by the public at all.

My nc is fine riding in up to 40C weather, but it won't handle delays in stop/start riding in traffic at those temps!

How odd... well I ride 80km up and down a very congested road here every weekend at 30 - 40km/h with lots of traffic lights so plenty of stopping. The bike gets warm and the fan comes on a lot but it doesn't over-heat. The journey takes me about two hours (my legs do get warm ) but no problems?

My old mans Fireblade CBR954 got a lot hotter and had the fan on a lot more often than the NC30.. I thought it ran on nuclear fusion or something

I've decided that FOR NOW I won't be fitting the cooler, I'll likely do it the next time I do an oil filter change. For now I think I've got enough to worry about with getting the new motor in and set up without having to worry about that too.